.TH std::chrono::operator<<(std::chrono::month) 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::chrono::operator<<(std::chrono::month) \- std::chrono::operator<<(std::chrono::month)

.SH Synopsis
   Defined in header <chrono>
   template< class CharT, class Traits >

   std::basic_ostream<CharT, Traits>&                                     \fI(since C++20)\fP

       operator<<( std::basic_ostream<CharT, Traits>& os, const
   std::chrono::month& m );

   If !m.ok(), inserts unsigned(m) followed by " is not a valid month" to os.
   Otherwise, forms a std::basic_string<CharT> s consisting of the abbreviated month
   name for the month represented by m, determined using the locale associated with os,
   and inserts s into os.

   Equivalent to

   return os << (m.ok() ?
       std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L%b}"), m) :
       std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{} is not a valid month"),
   unsigned(m)));

   where STATICALLY_WIDEN<CharT>("...") is "..." if CharT is char, and L"..." if CharT
   is wchar_t.

.SH Return value

   os

.SH Notes

   This operator<< is primarily intended for debugging use. For control over
   formatting, use std::format.

   Defect reports

   The following behavior-changing defect reports were applied retroactively to
   previously published C++ standards.

     DR    Applied to        Behavior as published               Correct behavior
   P2372R3 C++20      the given locale was used by default L is needed to use the given
                                                           locale

.SH See also

   format                             stores formatted representation of the arguments
   (C++20)                            in a new string
                                      \fI(function template)\fP
   std::formatter<std::chrono::month> formatting support for month
   (C++20)                            \fI(class template specialization)\fP
